How would I obtain insurance on my apple laptop while traveling and staying in hotels and at conventions? Does regular travel insurance through the airlines work?
You'd have to contact the airlines to verify that, but I highly doubt that the airlines would cover a computer that is lost/damaged during a stay at the hotel. Could be wrong, though, if they are issuing some type of complete travel policy.
If you own a home or have renter's insurance, you should be able to get either a rider on your policy or a separate Personal Articles policy that will cover your mac and accessories. If that's your only computer, you might even check with your insurance agent to see if it is already covered under an existing policy, though the ceiling for electronics on a base policy is often very low ($1,000 - 1,500 range).
I have a personal articles policy through State Farm that covers my laptops for replacement cost in the event of theft or damage. I believe I have a $100 deductible and I think the policy runs me about $60/year. Since I travel frequently, it offers a little peace of mind should something happen.